big bangs. >> reporter: officers shoot26-year-oldtamerlantsarnaevwho later died with explosives strapped to his body. his younger brother dzhokhar flees, armed and dangerous. >> we're looking for a suspect consistent with the description of suspect number two. >> reporter: more than 9,000 officers mobilized, much of boston under lockdown as authorities search high and low for suspect number two. >> we believe this to be a terrorist. we believe this to be a man who has come here to kill people. >> reporter: as the hunt continues, the suspect's family speaks out. >> translator: someone framed them. i don't know who exactly did it but someone did, and being cowards, they shot the boy dead. >> he put a shame on the tsarnaev family, he put a shame on the entire chechen ethnicity. >> reporter: late friday, still no capture. >> we do not have an apprehension of our suspect this afternoon, but we will have one. >> reporter: but just an hour later, officers have suspect number two cornered. >> they have the suspect, they believe it is the suspect, they know exactly where he is. they've c